[LU-11383] A lot of cfs_fail_loc error message for Fake I/O

• Type: Improvement
• Resolution: Duplicate
• Priority: Minor
• Assignee: Li Xi
• Reporter: Li Xi

Description

Usually, enabling fake I/O means there will be benchmark running on the system. However, a lot of messages are printed to the console:

 

Sep 17 05:50:49 es200nv2-vm1 kernel: systemd-journald[690]: /dev/kmsg buffer overrun, some messages lost.
Sep 17 05:50:49 es200nv2-vm1 kernel: Lustre: *** cfs_fail_loc=238, val=0***
Sep 17 05:50:49 es200nv2-vm1 kernel: Lustre: *** cfs_fail_loc=238, val=0***
Sep 17 05:50:49 es200nv2-vm1 kernel: Lustre: *** cfs_fail_loc=238, val=0***
Sep 17 05:50:49 es200nv2-vm1 kernel: Lustre: *** cfs_fail_loc=238, val=0***
Sep 17 05:50:49 es200nv2-vm1 kernel: Lustre: *** cfs_fail_loc=238, val=0***
Sep 17 05:50:49 es200nv2-vm1 kernel: Lustre: *** cfs_fail_loc=238, val=0***

 

This is annoying, because a lot of CPU resource will be used by message printing.

Issue Links

• duplicates: LU-11373 CERROR/CWARN messages are not throttled
• is duplicated by: LU-11384 wrong check in libcfs_debug_vmsg2()